Improvement in wax-thread sewing-machines



UNITED STATES PATENT OEEIoE.

EDwiN E. BEAN, or BoSToN, MASSACHUSETTS.

IMPROVEMENT IN WAX-TH READ SEWING-MACHINES.

Speciication forming part of Letters Patent No. 216,078, dated June1879; application filed November 27,1878.

To all 'whom it may concern:

Be it known that I, EDWIN E. BEAN, of Boston, in the county ofv Suffolkand State ot' Massachusetts, have invented an Improvement in WaX-ThreadSewing-Machines, of which the following is a full, clear, concise, andexact description, reference being' had to the accompanying drawings,making a part hereof.

In the drawings, Figure l is a section, and Fig. 2 a rear view, of amachine embodying my invention.

In that class of sewing-machines known as wax-thread machines,77 inwhich a hooked needle is used on one side of the work and an awl on theother side, much difficulty has been-experienced in the construction ofmechanism for actuating the needle and awl,rbecause of the peculiartiming necessary in the reciprocating motions of the needle and awl. Thepoints of the needle and awl should be well apart when the needlepoint,in, descend ing, gets below the surface of the work-plate, in order toallow the material to be readily put on and taken off' the workplate;but they should be close together in their ascent, in order that theneedle shall enter the work before the awl leaves it.

Various mechanisms have been heretofore devised for thus actuating thehooked needle and awl; and my present invention consists in a newcombination of mechanism for that purpose, which is simple,- of fewparts, lightrunning, durable, and much less noisy than the mechanism forwhich it is designed as a substitute, for my invention is especiallyvaluable in altering over the old-style machines, to make them closer tothe present standard.

My invention consists in the combination, with the awl and needle-barsof a waxthread sewing-machine, of a main shaft having upon In alteringover the old Hat-table machine,7 so called, the end of the shaft can bebrought up so close to the needle-bar that a single link will answer toconnect the needle-bar with its crank; but in altering over the post 1nachine,7 so called, as the end of the shaft cannot be brought close tothe needle-bar, the link should be connected to the rock-shaft commonlyused in the post machine, as will be clear to all skilled in the art.

In both these old-style machines the main objection vis to thebell-crank lever and cams for actuating the awl and the needle-bars 5and the object of my invention is not only to do away with` thebell-crank lever and cams, but

to provide a mechanism which will enable meto alter over these old stylemachines and make them substantially as good as the best machines now inthe market. The bell-crank lever and cams for operating the awl andneedle bars in the old-style at-table and post machines can be replacedby my new mechan ism at an expense not greater than the annual expenseof repairs.

In the drawings, a'l represents 'the frame of a wax-thread"sewing-machine, and b is the awl-bar, located in vertical bearings inthe forward end of the goose-neck a', as usual. c is the rotarydriving-shaft, located in bearings below the work-plate a", and providedwith a fly-wheel, d, as usual.' f is the awl-operating lever, supportedon the fulcrum-pin g in the goose-neck of the machine, and connected atits forward end to the awl-bar b and at its rear end to the eccentric.

On the end of the lever f is a sleeve, k, prevented from endwisemovement by the collars t' t', which are secured to the lever with thesleeve k between them. The connecting rod or link h is connected to thesleeve k, as shown, at one end, and to the eccentric-strap l at theother end, so that the motion of the eccentric l will vibrate the leverf, and the rod hbe free to move in all directions necessary to preventcramping.

The needle-bar is connected to the crank m by the wrist-pin m', link n,and wrist-pin n in the flat-table machines of the old style; but

in altering over the old post machines the` bars of a Wax-threadsewing-machine, of link u, disk fm, shaft c, eccentric l,eccentric-strap Z, link h, sleeve 7c, and lever f, fulcrumed near itsmiddle in gooseneck a', all combined and arranged together substantiallyas described.

In testimony that I claim the foregoing as my own invention I haveaffixed my signature in presence of two Witnesses.

EDI/VIN E. BEAN.

Witnesses:

ALBAN ANDRN, L. N. MLLER.

